Chainsaw guide bar straightener

Abstract

The chainsaw guide bar straightener has a flat table having a length of about ⅔ of the nominal length of a chainsaw guide bar, and a clamp on one corner of the table. The clamp is used for pressing the guide bar down against the table along a diagonal of the guide bar, for better measuring deformation in the guide bar. In another aspect, the chainsaw guide bar straightener has a pair of spaced apart anvil posts mounted to the frame thereof. These anvil posts define an open space there between. The chainsaw guide bar straightener further includes an hydraulic cylinder mounted to the machine frame. The hydraulic cylinder has a rod end head being movable along a working axis extending between the anvil posts and being centered with the open space, for straightening a chainsaw guide bar that is positioned between the rod end head and the anvil posts.

What is claimed is: 
     
       1. A chainsaw guide bar straightener for repairing chainsaw guide bars, comprising:
 a machine frame; 
 a pair of spaced apart anvil posts mounted to said machine frame; said anvil posts defining an open space there between; 
 an hydraulic cylinder mounted to said machine frame; said hydraulic cylinder having a rod end head being movable along a working axis extending between said anvil posts and being centered with said open space, for straightening a chainsaw guide bar when said chainsaw guide bar is positioned between said rod end head and said anvil posts. 
 
     
     
       2. The chainsaw guide bar straightener as claimed in  claim 1 , further including:
 a transverse slot for receiving and retaining a first portion of a chainsaw guide bar therein; 
 a working slot spaced apart from said transverse slot for receiving a second portion of said chainsaw guide bar therein; said working slot selectively aligning with said transverse slot; said working slot being selectively rotatable relative to said transverse slot for twisting said second portion of said chainsaw guide bar relative to said first portion when said chainsaw guide bar is mounted in said transverse slot and said working slot. 
 
     
     
       3. The chainsaw guide bar straightener as claimed in  claim 1 , wherein a spacing between said anvil posts is a depth of said chainsaw guide bar. 
     
     
       4. The chainsaw guide bar straightener as claimed in  claim 1 , further including a guide table between said anvil posts for holding said chainsaw guide bar across said working axis of said cylinder. 
     
     
       5. The chainsaw guide bar straightener as claimed in  claim 1 , further including:
 a flat table having a length of about ⅔ of a nominal length of said chainsaw guide bar; 
 a clamp on one corner of said table for pressing said chainsaw guide bar down against said table along a diagonal of said chainsaw guide bar, for measuring deformation in said chainsaw guide bar. 
 
     
     
       6. The chainsaw guide bar straightener as claimed in  claim 1 , further including:
 a hinge mounted to one of said anvil posts, and 
 an anvil plate movably mounted to said hinge, for selectively covering said open space between said anvil posts. 
 
     
     
       7. The chainsaw guide bar straightener as claimed in  claim 1 , further including a chainsaw guide bar grinder and a bar grinder table for guiding a chainsaw guide bar along said chainsaw guide bar grinder. 
     
     
       8. The chainsaw guide bar straightener as claimed in  claim 5 , further including a pair of spaced apart guide bar support blocks mounted to said frame for holding a chainsaw guide bar in a vertical alignment along said flat table. 
     
     
       9. The chainsaw guide bar straightener as claimed in  claim 6 , further including:
 a hole through said anvil plate, and 
 a punch mounted to said rod end head; said punch being mounted to register with said hole in said anvil plate. 
 
     
     
       10. The chainsaw guide bar straightener as claimed in  claim 1 , further including a gauge for measuring damage in a chainsaw guide bar mounting slot. 
     
     
       11. The chainsaw guide bar straightener as claimed in  claim 5 , further including a light adjustably mounted above said flat table. 
     
     
       12. The chainsaw guide bar straightener as claimed in  claim 5 , including an electric motor and hydraulic power system. 
     
     
       13. A chainsaw guide bar straightener for repairing chainsaw guide bars, comprising:
 a rectangular transverse slot for receiving and retaining a first portion of a chainsaw guide bar therein; 
 a rectangular working slot spaced apart from said rectangular transverse slot along a linear dimension for receiving a second portion of said chainsaw guide bar therein; said rectangular working slot selectively aligning with said rectangular transverse slot; said rectangular working slot being selectively rotatable relative to said rectangular transverse slot in a plane extending perpendicularly to said linear dimension for twisting said second portion of said chainsaw guide bar relative to said first portion when said chainsaw guide bar is mounted in said rectangular transverse slot and said rectangular working slot. 
 
     
     
       14. The chainsaw guide bar straightener as claimed in  claim 13 , wherein said working slot is rotatable about a rotation axis lying on a line perpendicular to a midpoint of a vertical dimension of said transverse slot. 
     
     
       15. The chainsaw guide bar straightener as claimed in  claim 14 , further comprising:
 a machine frame; 
 a pivoting frame enclosing said working slot and said rotational axis, said pivoting frame being mounted to a stub shaft extending from said machine frame along said rotational axis; and 
 an hydraulic cylinder connected to said machine frame and to said pivoting frame for rotating said pivoting frame about said rotational axis. 
 
     
     
       16. The chainsaw guide bar straightener as claimed in  claim 15 , wherein said hydraulic cylinder is mounted to a portion of said pivoting frame offset from said rotational axis, and further comprising a stiffening bar mounted to said rotational axis and to said machine frame for reinforcing said stub shaft. 
     
     
       17. The chainsaw guide bar straightener as claimed in  claim 16 , wherein said stiffening bar is removably mounted to said machine frame by bolts. 
     
     
       18. The chainsaw guide bar straightener as claimed in  claim 14 , wherein said chainsaw guide bar has a nominal length and said working slot is offset from a midpoint along horizontal dimension of said transverse slot a distance equivalent to about ⅔ of said length of said chainsaw guide bar. 
     
     
       19. The chainsaw guide bar straightener as claimed in  claim 18 , further including a pair of spaced apart guide bar support blocks mounted to said machine frame for holding said chainsaw guide bar in a vertical alignment and inspecting said chainsaw guide bar.